binutils: CVE-2017-9749

Source: binutils-gdb.git
MR: 74010
Type: Security Fix
Disposition: Backport from binutils-2_29
ChangeID: 5b89fbcab899af53585b61bd40724a38bff831d3
Description:

  Prevent invalid array accesses when disassembling a corrupt bfin binary.

        PR binutils/21586
        * bfin-dis.c (gregs): Clip index to prevent overflow.
        (regs): Likewise.
        (regs_lo): Likewise.
        (regs_hi): Likewise.

Affects: <= 2.28
Author: Nick Clifton <nickc@redhat.com>
Signed-off-by: Thiruvadi Rajaraman <trajaraman@mvista.com>
Reviewed-by: Armin Kuster <akuster@mvista.com>
Signed-off-by: Armin Kuster <akuster@mvista.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

diff --git a/meta/recipes-devtools/binutils/binutils-2.27.inc b/meta/recipes-devtools/binutils/binutils-2.27.inc
index 5c3d3ca223da0ab66d28e237545b79c8f26e0f3d..5e1e0be3939f5ed480b5ff84c9a88fb035fdf20c 100644 (file)
--- a/meta/recipes-devtools/binutils/binutils-2.27.inc
+++ b/meta/recipes-devtools/binutils/binutils-2.27.inc
@@ -79,6 +79,7 @@ SRC_URI = "\
      file://CVE-2017-7299_1.patch \
      file://CVE-2017-7299_2.patch \
      file://CVE-2017-9751.patch \
+     file://CVE-2017-9749.patch \
 "
 S  = "${WORKDIR}/git"
 

diff --git a/meta/recipes-devtools/binutils/binutils/CVE-2017-9749.patch b/meta/recipes-devtools/binutils/binutils/CVE-2017-9749.patch
new file mode 100644 (file)
index 0000000..a033d3d
--- /dev/null
+++ b/meta/recipes-devtools/binutils/binutils/CVE-2017-9749.patch
@@ -0,0 +1,75 @@
+commit 08c7881b814c546efc3996fd1decdf0877f7a779
+Author: Nick Clifton <nickc@redhat.com>
+Date:   Thu Jun 15 11:52:02 2017 +0100
+
+    Prevent invalid array accesses when disassembling a corrupt bfin binary.
+    
+       PR binutils/21586
+       * bfin-dis.c (gregs): Clip index to prevent overflow.
+       (regs): Likewise.
+       (regs_lo): Likewise.
+       (regs_hi): Likewise.
+
+Upstream-Status: Backport
+
+CVE: CVE-2017-9749
+Signed-off-by: Thiruvadi Rajaraman <trajaraman@mvista.com>
+
+Index: git/opcodes/bfin-dis.c
+===================================================================
+--- git.orig/opcodes/bfin-dis.c        2017-09-21 13:53:52.667168259 +0530
++++ git/opcodes/bfin-dis.c     2017-09-21 13:54:00.603231339 +0530
+@@ -350,7 +350,7 @@
+   REG_P0, REG_P1, REG_P2, REG_P3, REG_P4, REG_P5, REG_SP, REG_FP,
+ };
+ 
+-#define gregs(x, i) REGNAME (decode_gregs[((i) << 3) | (x)])
++#define gregs(x, i) REGNAME (decode_gregs[(((i) << 3) | (x)) & 15])
+ 
+ /* [dregs pregs (iregs mregs) (bregs lregs)].  */
+ static const enum machine_registers decode_regs[] =
+@@ -361,7 +361,7 @@
+   REG_B0, REG_B1, REG_B2, REG_B3, REG_L0, REG_L1, REG_L2, REG_L3,
+ };
+ 
+-#define regs(x, i) REGNAME (decode_regs[((i) << 3) | (x)])
++#define regs(x, i) REGNAME (decode_regs[(((i) << 3) | (x)) & 31])
+ 
+ /* [dregs pregs (iregs mregs) (bregs lregs) Low Half].  */
+ static const enum machine_registers decode_regs_lo[] =
+@@ -372,7 +372,7 @@
+   REG_BL0, REG_BL1, REG_BL2, REG_BL3, REG_LL0, REG_LL1, REG_LL2, REG_LL3,
+ };
+ 
+-#define regs_lo(x, i) REGNAME (decode_regs_lo[((i) << 3) | (x)])
++#define regs_lo(x, i) REGNAME (decode_regs_lo[(((i) << 3) | (x)) & 31])
+ 
+ /* [dregs pregs (iregs mregs) (bregs lregs) High Half].  */
+ static const enum machine_registers decode_regs_hi[] =
+@@ -383,7 +383,7 @@
+   REG_BH0, REG_BH1, REG_BH2, REG_BH3, REG_LH0, REG_LH1, REG_LH2, REG_LH3,
+ };
+ 
+-#define regs_hi(x, i) REGNAME (decode_regs_hi[((i) << 3) | (x)])
++#define regs_hi(x, i) REGNAME (decode_regs_hi[(((i) << 3) | (x)) & 31])
+ 
+ static const enum machine_registers decode_statbits[] =
+ {
+Index: git/opcodes/ChangeLog
+===================================================================
+--- git.orig/opcodes/ChangeLog 2017-09-21 13:54:00.543230862 +0530
++++ git/opcodes/ChangeLog      2017-09-21 14:06:03.772928105 +0530
+@@ -1,5 +1,13 @@
+ 2017-06-15  Nick Clifton  <nickc@redhat.com>
+ 
++      PR binutils/21586
++      * bfin-dis.c (gregs): Clip index to prevent overflow.
++      (regs): Likewise.
++      (regs_lo): Likewise.
++      (regs_hi): Likewise.
++
++2017-06-15  Nick Clifton  <nickc@redhat.com>
++
+       PR binutils/21588
+       * rl78-decode.opc (OP_BUF_LEN): Define.
+       (GETBYTE): Check for the index exceeding OP_BUF_LEN.